Bell Jet Ranger
Credit - "Copyright 1996-2000 Bell Helicopter Textron, Inc."
Sikorsky S-61N provides oilrig support.
Credit - The Captain Michael King Smith Evergreen Aviation Educational Institute
Air ambulance evacuation with a Bell.
The Bell 47
Credit - Helicopter History Site http://www.helis.com
The Aerospatiale Puma
Westland-Sikorsky S-51